Machine for making sand molds.



No. 646,188. Patented Mar. 27, I900.

W. MURCHEY.

MACHINE FOR MAKING SAND MULDS.

(Application filed Mar. 6, 1899.) (No Model.) 2 Sheets-Sues! I.

INVENTOR I v zm amo m y W1 TNESSES {$4.

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No. 646,|88. Patented Mar. 27, i900.

w MURCHEY MACHINE FOR MAKING SAND MOLBS.

(Application filed Mar. 6, 1899.)

2 Sheets-Shea: 2

(No Model.)

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Molds; and I declare the following to bea full,

UNITED STATES i FFICE.

PATENT MACHINE FOR MA KING SAND MOLDS.

srncrrzcn'rron r hlg m of Letters'riatent No. 646,188, dated March .27, 1900.

Application filed March 6,1899.

Serial No. 707,862. (No model.)

To all whom, it may concern: a

Be it-known that I, WILLIAM M URCHEY, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new'and useful Improvement in Machines for 'Making Sand clear, and exact description of the same, such. as will enable others skilled in the art to which it pertains to make and use the same, reference beinghad to the accompanying draw- -ings,which vform a part of this specification.

This invent-ion relates to mold-making machines, and has for its object an improved form of mold-packing machines by which a sand mold is ,formed readily and quickly.

The machine itself is simplyconstructed and easily operated;

Inthedrawinga-Figure-l isyan end eleva' tion. Fig. 2 is a vertical sectionlongitudinal of the shaft by which the pressis operated.

A indicates a frame, in which there is journaled a horizontal shaft B, which is provided with a driving-wheel B, that receives power from any convenient source of power, as from the pinion B on the counter-shaft B The pinion B is on a counter-shaft which is provided with clutch mechanism, so that a constantly-driven sprocket-wheel B can be employed to intermittently actuate the. shaftB. N Near the middle part of the frame A there is mounted on the-shaft B an eccentric b, that engages under the lower end of a standard a, which is arranged .to slide vertically in the frame A. Atislower end the standard 0 carries'a friction-roller .c'.- At its upper end the standard 0 carries a table c and on the ta ble 0 isplaced the mold is made. v

At each side of the frameA is'a projection or stud a, and on each stud is journaled the. eye-of a lever e. The two levers e e are yoked together at their upper end bya broad platenshaped yoke adapted to engage on its under surface over the upper side part of the'fiask of sand in which the mold'is to bemade. The platen p is adjustably mounted on the-levers pattern from which .the

- e and is held in place by'nuts 19, that are run on the screw-threaded upper terminals of the levers and are located below the platen. Nuts the platen, hold the cal movement above the table 0 proach to the table 0 is adj ustabl y limitedvby 12 run onto the terminals of thelevers e above platen from escaping, and springs 133, which are interposed between the platen and the nuts 19, furnish a yielding resistance to the upward movement of the platen when the flask is lifted against it in the way hereinafter described.

Near the top of the frame A and'on each side of it there is a bracket 6, bolted or otherwisesecured-to the frame, and through each bracket 17 is a vertical hole or passage,through which is inserted a standard or guide 0 that plate C is capable of an independent verti- Its apadjustable stop-screws c On the front side ofthe frame A is a bracket D, in which is journaleda rock-shaft d, from theends of which rock shaft d rock-arms at project and areal-ranged to swing-under the ends of the legs 0 (1 From the middle of the rock-shaft d an arm d projects on the forward side, and the arm d fis connected by a link (1 to a foot-lcsupports the stripper-plate O. The stripperand engage against. a stop verf,suitably mounted with respect to the main part of the machine. A spring (1 is arranged to pull thearm d upward and back and to bring the extreme end of the arm d against the stop (i In this position the strip per-plate is lowered to its lowermost'position and the foot-lever f is raised. Depression of the foot-lever lifts the stripper-plate; but as soon as the foot or other, power which de-' presses the foot-lever f is removed the spring d returns these parts to their normal position. The yoke-platep and the levers or arms on which it is mountedswing on the studs a from a position in which the yoke-plate is above and parallel to the stripper-plate and thepresser-table' c to a position at the rear,

such that the flask F may be readily removed from the stripper-plate.- l The operation of the machine is as follows: Thepattern is placed on the table 0 and a stripper-plate suited to the pattern is mounted on the uppercnds of the vertically-sliding guides cf, The stripper-plate is easily rem ov able by taking out the screws 9, which hold this plate to the guides. are properly adjusted to allow the stripper- The stop-screws c plate to rest on the flat,-or follow-board, part of the pattern, with medallion parts of the pattern projecting through and above the surface of tho stripper-plate. The half of the flask, either the cope or the drag part, as the case may be, is placed above the stripperplate and pattern and filled with sand. Above the flask is placed a frame R to hold the necessary surplus sand to enable the proper compression or packing against the mold. The

yoke p, provided with a press-board 0", that enters the frame R, is swung over the flask, and pressure is applied by revolving the shaft B and the cam b. After the sand has been sufficiently compressed or packed the table c is dropped, and the parts resting above it, consisting of the stripper-plate and flask, all drop with it, the yoke-plate p is swung back, the auxiliary sand-holder R removed, and the top of the flask struck, and the stripper-plate is then lifted by applying the foot to the treadle f. The stripper-plate in lifting carries up with it the half-flask, and the halffiask can then be readily lifted OK the machine and joined to its mate, in which the other part of the mold has been made, either by previous operation of the same machine or (in case the mold dilfers in its obverse and reverse sides) by an operation on an adjoining machine. \Vhere the pattern is alike on both sides, both parts may be made consecutively on one machine; but where the mold in the cope difiers from the mold in the drag the two parts are made on different machines. The guides of the stripper-plate drop until their lower ends engage the ends of the rock arm (1'. The table 0 continues to fall and draws the pattern through the stripper-plate and out of the sand. The half-flask can then be readily lifted off.

In order to facilitate the removal of the mold, it is first raised above the highest part of the pattern by depressing the lever f, thus raisin g the stripper-plate C by the action of the arms (1 upon the lower ends of the legs 0. When the mold has been removed, the lever f is still further depressed, carrying the arms d from under the legs 0 thus allowing the stripper-plate to fall against the stop-screws c? in position to receive a flask and its sand for the making of another mold. When the pattern and mold are again raised by means of the eccentric b, the lower ends of the legs c o. are raised above the arms (1, and said arms are drawn by means of the spring (Z- under said legs and against the stop (1 in position to limit the downward movement of the stripper-plate C, so that the pattern will be withdrawn from the sand, as above described.

What I claim is- 1. Ina machine for making sand molds,in combination with a vertically-movable pattern-supporting table, a vertically-movable stripper-plate table, a swinging arm engaging under the stripper-plate table, arranged to lift, and then swing clearfrom its supporting position, and means for automatically returning the swinging arm to its supporting posi tion, substantially as described.

2. In a machinefor making sand molds, in

combination with a pattern-table vertically movable, a stripper-plate also vertically movable, a swinging arm-arranged to sustain the stripper-plate and means whereby the said swingin g arm first lifts the said stripper-plate and then by a continuance of the same motion swings from under and allows the stripper-plate to drop, substantially as described. In testimony whereof I sign this specification in-the presence oftwo witnesses. WILLIAM MURCHEY. Witnesses:

CHARLES MURCHEY, CHARLES F. BURTON. 

